Divided by 1.600 gives Miles/sec (divided by 1.800: Nautical Miles/sec), because one Mile is 1.600 m, one nautical mile is 1.800 m. . Multiplied by 60 gives Miles or Nautical Miles per minute. I have no pocket calculator here. You must divide and multiply yourself.

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keywords: 10,per,of,vacuum,speed,mi,is,The,2.998,light,its,in,miles,min,What,minute,The speed of light in a vacuum is 2.998 x 10^8 m/s. What is its speed in miles per minute (mi/min)